47749240 has 128 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 14446080.

The previous prime is 47749199. The next prime is 47749241. The reversal of 47749240 is 4294774.

47749240 = T₁₀₀ + T₁₀₁ + ... + T₆₅₉.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 47749240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47749241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113751 + ... + 114169.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^47749240 is an apocalyptic number.

47749240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47749240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68947200).

47749240 is an abundant number, since it is smaller than the sum of its proper divisors (90145160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47749240 is a wasteful number, since it uses less digits than its factorization.

47749240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 47749240 is about 6910.0824886538. The cubic root of 47749240 is about 362.7901505746.

The spelling of 47749240 in words is "forty-seven million, seven hundred forty-nine thousand, two hundred forty".